Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0962fc7a1795b8…

MALICIOUS

PDF

63.8 KB Created: 2020-12-31 01:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0fef3ed6cc95f80573cb15114b0cfcb SHA-1: 1e293ae0d792cc32bcde769c921b2ce8ca2ec218 SHA-256: 1a0962fc7a1795b82c629f7e1ced4a1b1345e01dfeecf2e602035cc35bcb4cd3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/strik?utm_term=dream+rider+movie
    • https://cdn.sqhk.co/zotipimesaza/tihgf8y/61847718950.pdf
    • https://cdn.sqhk.co/gewanunu/hfOibjO/xbox_360_wireless_headset_charger.pdf
    • https://tuwagufo.weebly.com/uploads/1/3/3/9/133999840/4e09cee1bdb21.pdf
    • https://cdn.sqhk.co/niturunajik/QQPegfE/xakajuzawixeludeger.pdf
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/c0bb65803ba.pdf
    • https://dumejolizaxoko.weebly.com/uploads/1/3/0/8/130814858/c4d6f7cf.pdf
    • https://static.s123-cdn-static.com/uploads/4458826/normal_5feb640b3f212.pdf
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5fb40f6c53701.pdf
    • https://wizawexixif.weebly.com/uploads/1/3/4/4/134472694/nazelukoramizom_sonatevifum_sejekuporin.pdf
    • https://static.s123-cdn-static.com/uploads/4393179/normal_5fdd7a67e465e.pdf
    • https://cdn.sqhk.co/pevukoza/hchhS9Z/drop_it_like_it_s_hot_haarper.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wufujudisu/doluweze.pdf
    • https://s3.amazonaws.com/jixerubowi/kobipuzimufeninasadibipo.pdf
    • https://s3.amazonaws.com/waxapoz/proclamation_on_the_family_printable_8x11.pdf
    • https://s3.amazonaws.com/mixanaz/gelonijuvalobige.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bed1.bin
714a04f34de081b24ec743684f97f676a39cc5abfa3fd4cbe34978269474794a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBED1 4820 bytes
font_01_sfnt_off0000cf25.bin
d10a7ddcbf6e3982a987fc62f853129d5aca9b2be33644ff091b9af8b3ff79f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 10292 bytes